In a given frictionless displacement of a particle, its kinetic energy increases by 25 J while its potential energy decreases by 10 J. Determine the work of the nonconservative forces acting on the particle during this displacement
a. ?15 J
b. +35 J
c. +15 J
d. ?35 J
e. +55 J
c
Physics & Space Science
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In the diagram, if the current through R1 is 5 A up and if the current through R3 is 3 A up, what is the current in R2?
]
A. 8 A up
B. 8 A down
C. 2 A up
D. 2 A down
E. more information is needed
Physics & Space Science
The density of iron at room temperature is listed as
Physics & Space Science
A star with an apparent magnitude of 10 appears fainter than a star with an apparent magnitude of 9
Indicate whether the statement is true or false
Physics & Space Science
A spring with spring constant k = 800 N/m is compressed 12 cm from its equilibrium position. A spring with spring constant k = 400 N/m has the same elastic potential energy as the first spring when its extension is
a. 0.060 m. b. 0.085 m. c. 0.12 m. d. 0.17 m. e. 0.24 m.
Physics & Space Science